ATI
Q45C2 2E Conductivity System
Part 1 – Introduction
O & M Manual
Revision K (01/07)
- 5 -
1.2 Features
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Standard Q45C2 electronic transmitters are designed to be a fully isolated, loop
powered instruments for 2-wire DC applications. Optional integral power supply card for
115/230 VAC operation, and optional battery power supply card for portable datalogging
applications are available.
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Output Hold, Output Simulate, Output Alarm, and Output Delay Functions. All forced
changes in output condition include bumpless transfer to provide gradual return to on-
line signal levels and to avoid system control shocks on both analog outputs.
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AC power option provides dual SPDT relay operation and one additional isolated analog
output. Software settings for relay control include setpoint, deadband, phase, delay, and
failsafe. Software controls automatically appear in menu list when hardware option card
is plugged in and system power is applied.
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Two analog outputs on the relay version may be configured to track conductivity and
temperature. Both analog outputs can be individually programmed to fail to specific
values.
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Selectable Output Fail Alarm feature allows system diagnostic failures to be sent to
external monitoring systems.
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Large, high contrast, custom Super-Twist display provides excellent readability even in
low light conditions. The secondary line of display utilizes 5x7 dot matrix characters for
clear message display Two of four measured parameters may be on the display
simultaneously.
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Diagnostic messages provide a clear description of any problem with no confusing error
codes to look up. Messages are also included for diagnosing calibration problems.
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Quick and easy one-point calibration method and sensor zero-cal. To provide high
accuracy, all calibration methods include stability monitors that check temperature and
main parameter stability before accepting data.
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Selectable Pt1000 or Pt100 temperature inputs. Systems can also be hard-configured
for three-wire elements. Temperature element can be user calibrated.
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Security lock feature to prevent unauthorized tampering with transmitter settings. All
settings can be viewed while locked, but they cannot be changed.
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High reliability, microprocessor-based system with non-volatile memory back-up that
utilizes no batteries. Low mass, surface mount PCB construction containing no
adjustment potentiometers. All factory calibrations stored in non-volatile EEPROM.
